Effect of intravenous supplements of L-methionine on milk yield and composition in cows given silage-cereal diets.
Eight cows in mid lactation and receiving a diet of perennial ryegrass silage and barley (70:30 on a DM basis) were given intravenous supplements of L-methionine (8 g/d). The methionine treatment had no significant effect on milk yield, protein content or lactose content, but increased milk fat content and yield by approximately 10% (P less than 0.05).
D000818:Animals; D002417:Cattle / Q000502:physiology*; D004032:Diet; D005260:Female; D007774:Lactation; D007785:Lactose / Q000378:metabolism; D050356:Lipid Metabolism; D008715:Methionine / Q000008:administration & dosage / Q000378:metabolism*; D008892:Milk / Q000032:analysis / Q000378:metabolism*; D008894:Milk Proteins / Q000378:metabolism; D010288:Parenteral Nutrition / Q000662:veterinary; D011247:Pregnancy; D013237:Stereoisomerism
D008894:Milk Proteins; D008715:Methionine; D007785:Lactose